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Which cuff size is preferable for blood pressure monitoring in most hypertensive patients?
C Wittenberg1, A Erman, J Sulkes
1Institute of Nephrology and Hypertension, Beilinson Medical Centre, Petah Tiqva, Israel.
Insights
Accurate blood pressure (BP) measurement is crucial for obese hypertensive patients. Using a large cuff, not a standard one, is recommended for overweight individuals to avoid overestimating BP readings.
Area of Science:
- Cardiology
- Hypertension Management
- Medical Device Accuracy
Background:
- Accurate blood pressure (BP) measurement in obese hypertensive patients remains a challenge.
- Standard BP cuffs may lead to inaccurate readings in individuals with larger arm circumferences.
Purpose of the Study:
- To evaluate the appropriateness of large-sized BP cuffs for measuring BP in hypertensive patients with varying arm circumferences.
- To determine if standard BP cuffs overestimate BP in overweight hypertensive individuals.
Main Methods:
- Fifty hypertensive patients were enrolled, divided into two groups based on arm circumference (<30 cm and >=30 cm).
- BP measurements were taken using both standard and large cuffs under standardized conditions.
- Ambulatory blood pressure monitoring (ABPM) was performed using a large cuff for comparison.
Main Results:
- In overweight patients (arm circumference >=30 cm), the standard cuff significantly overestimated BP compared to the large cuff (P < 0.0004).
- In patients with smaller arm circumferences (<30 cm), the large cuff showed a statistically significant, though smaller, difference in BP readings compared to the standard cuff (P < 0.003).
Conclusions:
- Large BP cuffs should be exclusively used in overweight hypertensive patients to ensure accurate BP measurement.
- The optimal cuff size for lean hypertensive patients requires further investigation.
Abstract:
The accuracy of blood pressure (BP) measurements in obese hypertensives is still controversial. We investigated whether a large sized cuff could be appropriate for BP measurements in patients with different arm circumferences. Fifty hypertensive patients (23 males and 27 females, mean age 54 +/- 12 years, mean weight 75 +/- 12 kg) underwent BP measurements under standardised conditions using both a standard cuff (23 x 12 cm) and a large cuff (34 x 15 cm). Ambulatory blood pressure monitoring (ABPM) was subsequently performed in each subject using a large cuff. The average of two measurements performed in the clinic was compared with the mean daytime measurements. Thirty-one subjects had an arm circumference of < 30 cm (group 1) and weighted 68 +/- 10 kg, while 19 (group 2) had a larger arm circumference (> or = 30 cm) and were overweight (86 +/- 8 kg). BP in group 1 was 149 +/- 23/91 +/- 12 mmHg with the standard cuff and 143 +/- 24/88 +/- 13 mmHg with the large cuff (P < 0.003). In group 2, the respective readings were 153 +/- 22/100 +/- 16 mmHg (standard cuff) and 144 +/- 19/93 +/- 16 mmHg (large cuff; P < 0.0004). These findings suggest that in overweight hypertensives, the use of the standard cuff results in overestimation of BP and that large cuffs should be used exclusively in this population. The use of a large cuff in lean patients has yet to be clarified.